| http://www.w3.org/ns/prov#value | - Representative examples of such cytokines include basic fibrogrowth factor which is produced by keratinocytes and fibroblasts and promotes the growth of epithelial cells; platelet-derived growth factor (PDGF) which is produced by platelets and the endothelium and other cell types and promotes the abnormal proliferation of epithelial cells in association with epidermal growth factor (EGF); transfor
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